Boat
Buoyant - is something that 'floats' on the surface of whatever medium it is resting on. For example a boat on water is buoyant.
If you're talking about something in say a tank of water, the buoyant force points up and opposes the downward force of gravity......
gravity
If it's floating, then the buoyant force on it is exactly equal to its weight. (That makes the vector sum of the vertical forces zero, which is why the object is not accelerating vertically.)
Boat
Buoyant - is something that 'floats' on the surface of whatever medium it is resting on. For example a boat on water is buoyant.
A rock sinks because it is not buoyant. Buoyancy is whether or not something floats in water. There are three levels of buoyancy; buoyant, neutrally buoyant, and not buoyant. When something is buoyant, that means it has a lower density than water, causing it to float. When something is neutrally buoyant, that means it has roughly the same density as water, causing it to float half way between the bottom and the surface. Finally, when something is not buoyant (like a rock), that means that it has a higher density than water, causing it to sink to the bottom.
No, lead is not buoyant. It is incredibly dense, which makes it very heavy, and not able to float.
yes
Salt Water, because it is makes things more buoyant.
No, the opposite.
You put it in water and see if it floats.
It's full of air that makes it buoyant
Salt makes sea water more buoyant. The Dead Sea has the most salt of any sea in the world, and even people who cannot swim have no problem floating in it.
Yes, hot air, helium, and hydrogen balloons are naturally buoyant in the atmosphere, which is composed primarily of gas.
A waftage is the conveyance of something on a buoyant medium, such as air or water.